SN74ALS240A-1DWR

Overview

The SN74ALS240A-1DWR is an octal buffer and line driver from Texas Instruments' ALS logic family, housed in a 20-pin SOIC package. It features three-state outputs with low-level active enable control. The device operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature range of -40°C to +85°C. Key electrical characteristics include a maximum propagation delay of 9ns at 5V and output drive capabilities of -15mA high and 48mA low.

Feature Summary

• Octal configuration providing eight independent buffering channels
• Three-state outputs controlled by a single low-active enable input
• High noise immunity characteristic of Advanced Low-Power Schottky technology

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented architectures

Procurement Notes

Verify the specific suffix 'A-1' against the manufacturer datasheet to confirm pinout and enable polarity. Ensure the SOIC-20 package matches the target PCB footprint. Confirm RoHS compliance status for the specific manufacturing lot before integration into final assemblies.

Selection Notes

Select this component when requiring high-speed buffering with strong low-level sink current capability. The ALS series offers a balance between speed and power consumption suitable for general-purpose digital systems. Verify that the 4.5V to 5.5V supply range aligns with the system's power rails.

Part Context

This part belongs to the SN74ALS240 family of octal buffers. It serves as a high-performance alternative to standard LS logic, offering faster switching speeds while maintaining lower power dissipation. The device is designed for driving heavy loads on data buses and memory interfaces.

Replacement Considerations

SN74ALS240DW is a compatible variant within the same family.